/**
 * Open URL payload definition.
 */
type OpenUrl = {
    /**
     * URL to open in system's default web browser.
     */
    url: string;
};
/**
 * Opens URL in the system's default web browser.
 *
 * @param payload Open URL payload.
 * @returns Steam open URL URL.
 * @example
 * openUrl({ url: 'https://store.steampowered.com/' })
 * // => 'steam://openurl/https://store.steampowered.com/'
 * @link https://developer.valvesoftware.com/wiki/Steam_browser_protocol
 */
export declare function openUrl(payload: OpenUrl): string;
export {};